Maybe make a list of types of projects you will want to do in your garage, and projects you can live without.
For example:
You may want to air up tires, so where does the air compressor go.
You may decide you want to enjoy your time off and hire out the lawn care. If so, there is no need to allocate space for a lawn mower.
I was changing the oil on a Mercury Grand Marquis for the first time yesterday. Drove it on the ramps, started the oil change, and discovered that removing the filter requires turning the steering wheel right so the filter can come out. Had to start over with a floor jack and jack stands. If I was space limited, I would get rid of the ramps, and just keep a floor jack and jack stands.
I see a staircase to get into the house from the garage. Will this be your last house? Moving sucks. If I were building a new house it would be handicap accessible and set up for ageing in place. Don't need that now, but might down the road. Actually I could use those features now for my Mother.